Scale.



L.' c.4wETzEL.

SCALE.

APPLICATION FILED IIIAII. 28. I9I2.

Patented J an. 23, 1917.

311 s 35 7 El kvcwfj@ l justinent of the scale by commodity upon weights to the other pan until the oom-v ITER STATES PATENT OEEIOE. 'l

LEWIS oALvIN WETZEL, OE TOLEDO, OHIO, ASSIGNOR, EY MESNE ASSIGNMENTS, To' TOLEDO SCALE COMPANY, OE TOLEDO, OHIO, A OORPORATION OE NEW JERSEY.

SCALE.

' Specification of Letters Patent.

rammed Jan. 23, ieri.

Application led March 28, 1912. Serial No. 686,827.

To all whom t may concern:

Be it known that I, LEWIS citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Scales, of which the following is a specification.

My invention relates more particularly to so-called even balance scales, the characteristic yfeature of which is abeam or leverl pivoted at the center of its length and carrying at Opposite ends pans orplatforms for the commodity to'be weighed and counterweights respectively. In the use of this kind of device it is customar to place the one pan an add known modit-y -is slightly overba'lanced. Such a scale has also been provided with a pointer attached to the beam at its pivotal point, which pointer vibrates over and co-acts with an arc-Shaped scale to indicate the excess in the weights of the commodity over the last unit of weight added. The objection to this class of Scale as heretofore built is that the range of weight which can be taken care of.

by the ypointer is necessarily extremely limited depending upbn the vertical distances.

between the center of gravity and point of suspension of the .beam which for accurate weighing must bey brought closetogether 'and as a result-the counterbalance weights added p by hand must necessarily closely approximate the full weight of the commodity,

requiring a considerablehandling of small weights. I

My invention relates -to scales of this character in which an evenbalance scale is provided with an index to indicate fractions of the weightsl which are added to the pan by hand, and its object is more particularly to dispense with the careful and minute adfollowing claimsand embodied in a Specific hand Weights bv increasing the scopeorcaform 'in the device illustratedin the accom. panying drawings and specifically described4 in the following specification. B ut it is to be understood that my invention 1s not 1.1m-, ited to the Specific structure disclosed ynor the "addition of f spectively. The legs a to any particular features thereof except C. WETZEL, a

in so far as they may be set forth in the claims.

In the accompanying drawings Figure l isa front elevation of my scale; Fig.l 2 is a fragmentary vertical section on the line 2-2 of Fig. 1 and Fig. 3 illustrates in perspective a detail of the invention to be hereinafter referred to.

The frame of the scale consists in a casting 4 which includes the base section 5 and the housing 6, which latter is adapted to contain the automatic weighing mechanism. The base 5 may be adjusted by thumb Screws 7, 7 to level the scale and carries in addition tothe hollow bolumn 8 which supports the automatic counterbalance mechanism and chart,` hollow vertical bosses 9, 9 which project upwardly therefrom and receive the stems 10, 10 (see Adotted lines) connected to the Scale pans 11,' 12. Upon opposite sides of the hollow column, speaking, to the front and rear thereof, are formed integral Aears 13, 14 inl the upper ends of which are received the agates 15, V16 upon which rest the knivesl?, 18 of the beam. The latter is formed preferably of a casting, with two longitudinall members 19, 20 extending to the front and rear respectively of the hollow post 8 and connected attheii ends into one rigid, preferably integral structure, and these members 19 and 20learry the knives 17 and 18 respectively. If desired the cavities in the ears 13 andl-f which receive the knife edges may be pleteness. y Y

sides of the ends of the yUpon opposite Ybeam are upwardly directed knife edges 27 lines at the left of (indicated in dotted Fig. l), upon which rest agates mounted in the depending legs 2,8, 29, formed integral with the castings 30, 3l` which Support the weight /and commodity receptacles re- 28, 29 extendy downwardly upon oppositesides of s cale lbeam and are connectedby yoke/sections or more properly 28', 29 to which the stems 10, l0 above referred to are connected, and the latter which are thus made rigid with the scale pans or supports, are extended downwardly through the bosses 9, 9 into the interior of the base casting (as shown in dotted lines in Fig. 1) and are connected at their lower ends to a stationary stud 30 upon the castingby means of links 31', 32. Upon the stem 10 is mounted a counterweight 33- which may be a shot cup for sealing the scale and is secured ,on therstem by a nut 3st and serves more particularly to offset the weight of the tare poise 33 hereinafter mentioned. A tare beam 32 is secured to the main beam parallel therewith and is suitably graduated and provided with the tare poise 33 to be used in a manner which will be readily understood. The base is further formed with a row of sockets 34, 35, 36, 37, adapted forI the reception of a corresponding series of weights 38, 39, 40, 41, and with an opening through which extends the dash-pot 42 secured to Ythe base by screws 43 passing through a flange 44 on the dash-pot and tapped into the base. The cover 45 of the dash-pot is provided with an upwardly extending cylinder 46 which is surrounded by a sleeve 47 secured to the piston rod, and the latter is pivoted to the beam, the purpose of the dash-pot being the usual one, to-wit, that ofpreventing violent motion of the beam and bringing the same rapidly to rest. The hollow column 8 merges at its upper end into a flat cylindrical chamber 48 which in turn expands into a flat fan-shaped .chamber 49, which chambers contain an automatic counterbalance mechanism and chart and index finger respectively. The counterbalance mechanism consists of a pendulum having a weight 50 adjustable lupon a Vrod 5l which latter is secured in a boss 52 upon a casting whichcomprises a segment 53 and an ear 54 to which the hand 55 of the indicator is riveted.

The casting above mentioned is mounted upon knives 56, which are suitably supported or lseated upon brackets or webs 57 secured to or forming part of the main casting. Upon `the segment at one end thereof is fastened a tape or strap 58, which is secured at its other end to an arm -59 rigidly attached to the beam at the middle thereof.

The construction of the arm and its means of attachment to the beam and ribbonK respectively are shown in' perspective in Fig.

3. A reference to that view and to Fig.

2.shows a cross piece 60 secured at its opposite ends to the members 19 and- 20 of the beam and extending through openings 61, 62 formed in the vhollow column for this purpose. The arm 59 ybefore mentioned is connected tothe cross piece by a 'fectly circular but is eccentric tapped into the angle piece and presses against the face on the upper end of the arm 59 and the other of which, 68', extends loosely through the angle piece 67 and is tapped into the upper end of the arm. By adjusting these screws in an obvious manner the angle piece 67 may be adjusted and rigidly held, and the effective lengthA of the tape 58 attached thereto, as hereinafter de-` scribed, increased or diminished.

An end of the tape or strap 58 is securedv to the angle piece 67' on the upper face 69 thereof by means of a cap plate 70 and screws extending therethrough and/tapped into the end portion of the angle piece 67 and the segment 53 referred to above, to

which the other end of the ribbon is secured, and with which it coperates, is not perto correct for the varying movements of the pendulum or equal increments of weight. The vchart 7l over which the indicator hand is preferably divided and numbered to indicate suitable fractions of the smallest weight unit which it is intended to use upon the weight pan, and the fan-shaped chart casing and the chamber whichA incloses the automatic counterbalancing mechanism are provided with glass panels or lwindows 72, 73 on their opposite sides.

55 moves The operation of my scale will now be I readily understood. When a commodity or article is to be weighed it is placed upon the scale pan at the right of Fig. 1 and if ity weighs less than the capacity of the chart 7l its weight will belimmediat'ely indicated. If, however, its weight exceeds the capacity of the chart, hand weights or poises 38,. 39,v etc., are to be added to the pan 11- until the'indicator hand returns from its extreme displaced position. The weight of the article will then be equal to the sum of the weights on the weight pan 11 plus the fraction indicatedby the chart..

llO

yIf the commodity to be weighed is contained ina receptacle, taremay be weighed in the usual manner by the tare poise andi^ beam.

It will now be evident that in my scale the indicator hand and chart is not limited in its capacity by'the stability factor of the beam but-may be determined at'the pleasure of the designer or by the purpose for which it is intended, Vwithin wide limits, depending as it does upon the proportion of parts and the weight ofthe pendulum, but preferisdetermined purely by convenience inuse and may be of any desired size. Many changes may be made inthe scale above specilically described; thus the central elevated l location of the automatic counterbalance and chart are obviously unessential to myinvention in its broader aspect and other modifcations not necessary to here suggest or enumerate come within the scope of my in' g vention as set forth below.

I claim: 1. In a weighing scale, a beam, a comymodity receptacle thereon, anl indicating chart, a pendulum adapted to offset load on the scale pan to the capacity of the chart, an index hand carried by the pendulum and c0- operating with the chart, an arm rigid with the beam and substantially perpendicular thereto, and an operative connection between the upper end of the arm and the pendulum.

2. In a weighing scale, a beam, a commodity receptacle thereon, an indicating chart, a pendulum suspended above the beam adapted to offset load on the scale panlto the capacity of the chart, an index hand carried by -the pendulum and coperating with the chart, an arm rigid with the beam and substantially perpendicular thereto, and an operative connection between thel upper end of the arm and the pendulum. f

3. In a weighing scale, ya base, a hollow column rising from the base, a frame constituting a beam or lever comprising longitudinal members extending on opposite sides vof thecolumn, a cross piece connecting the opposite members of the frame and extending through the column, an upright arm mounted on the cro-ss piece, a pendulum susl pended from the hollowY column, and connections between the upper end of the Iarm and the pendulum.

- Ll. In av weighing scale, a beam, a commodity receptacle thereon, an indicating chart, a pendulum hung `above the beam adapted to offset load on'the scale pan to the capacity of the chart, an indexhand carried bythe pendulum and coperating with the chart, an arm rigid with the beam and substantially perpendicular thereto, and an adjustable operating connection ibetween the upper end of the arm and the pendulum.

5. In a weighing scale, a beam, a commodity receptacle thereon,v an indicating chart, a pendulum hung above the beam adapted to offset lo-adon the scale -pan to the capacity'of the chart, an index hand carried by the pendulum and coperating with the chart, an arm-rigid with the beam and substantially perpendicular thereto, a member pivoted to the upper Aend of the beam and adjustable with relation thereto, a segporting a ment secured to the pendulum, and a tape connected to the segment andpivoted niember at'its opposite end.

6. In a weighing scale, ay beam, a com- Vjmodity receptacle thereon, a pendulum'liung above the beam,a segment rigid with the pendulum, an arm rigid with the beam and substantially perpendicular thereto, an angle piece pivoted to the upper end of the arm, adjusting screws for adjusting the angle piece 'with reference to the arm, and a tape connecting the anglepiece and the segment.

7. In a weighing scale, a beam, weight and commodity receptacles at the opposite ends thereof, anarm rigid with ther beam and extending substantially perpendicular thereto, a pendulum pivoted adjacent the upper end of the arm and substantially horizontal connections between the pendulum and upper end of the arm.

8. In a weighing scale, a beam, weight and.

commodity receptacles at the opposite ends thereof, an arm extending perpendicularly upward from the beam, a pendulum suspended near the upper end ofthe arm, a segment rigid with kthe pendulum, and a substantially horizontal tape connecting the segment and the upper end of the arm.

9. In a weighing scale, a beam having weight and commodity receptacles at the opposite ends thereof, an arm rigid with the beam and extending upward therefrom, a pendulum suspended near the upper end of the arm,`an adjustable member mounted on the upper end of the arm, and substantially horizontal connections between the member and the pendulum. v I l .10. In a weighing scale, a'base having a hollow column rising therefrom and supswinging pendulum, a pivoted frame constituting `a scale beam having a weight and a commodity receptacle `at its respective ropposite ends, the members Jof the frame extending on opposite sides of the hollow column, a cross piece rigid with the frame and extending through the hollow column, an arm mounted on the cross piece and extending upwardly within the column,r a pendulum pivoted near 'the upper end of the arm and supported by the column, and a connection between the pendulum and the arm.

11.. In a weighing scale, the combination of a base 5, a hollow column 8 rising therefrom and supporting a counterbalance chamber 48 and a scale housing 49,` a frame constituting an open beam pivoted in opposite sides of the column and supporting at its opposite ends a commodity receptacle and a weight receptacle respectively, a cross piece secured to the bea-m at its opposite ends and extending through the arm extending upwardly substantially perpendicular to the beam .within the .hollow column, a casting pivoted within the hollow column, an,

'lo y izo `the arm With the segment and a chart Within the housing 49 over Which the hand moves.

12. In a Weighing scale, a beam, a commodity receptaclel thereon, an indicating chart, a pendulum adapted to 'offset load on the scale pan to the capacity of the chart,

an index hand carried by the pendulum and coperating With the chart, an arm rising from the beam to a point near but to one sideof the pivot of the pendulum, and an operative connection between the upper end of the arm and the pendulum.

13. In a Weighing scale, a4 beam, a commodity receptacle thereon, an indicating chart, a pendulum adapted to offset loadon the scale pan to the capacity of the chart, an index hand carried bythe pendulum and coperating with thechart, an larm rising from the beam to a point adjacent butto one side of the pivot of the pendulum, and a substantially horizontal connection be# tween the pendulum and arm.

14. In a Weighing scale, a beam, a commodity receptacle thereon, an indicating chart, a pendulum adapted to oi'l'set load on the scale pan to. the capacity of the chart,

coperating with the chart, an arm rigid With the beam and substantially perpendicular thereto, a member pivoted to the upper end of the arm and adjustable with rel-ation thereto, a segment secured tothe pendulum, the curved edge of which is sub-.- stantially in the horizontal plane of the,

pivoted member, and a tape connected to the ,segment and pivoted member at its opposite ends.

LEWIS CALVIN WETZEL.

Witnesses:

E. E. LONGENECKER, J. A. BURKHOLDER.. 

